Sökning: onr:"swepub:oai:DiVA.org:su-207599" >
Predation impacts b...
Predation impacts brain allometry in female guppies (Poecilia reticulata)
-
- Vega-Trejo, Regina (författare)
- Stockholms universitet,Zoologiska institutionen,University of Oxford, UK
-
- Vila-Pouca, Catarina (författare)
- Stockholms universitet,Zoologiska institutionen,Wageningen University & Research, Netherlands
-
- Mitchell, David J. (författare)
- Stockholms universitet,Zoologiska institutionen
-
visa fler...
-
- Kotrschal, Alexander (författare)
- Stockholms universitet,Zoologiska institutionen,Wageningen University & Research, Netherlands
-
visa färre...
-
(creator_code:org_t)
- 2022-06-21
- 2022
- Engelska.
-
Ingår i: Evolutionary Ecology. - : Springer Science and Business Media LLC. - 0269-7653 .- 1573-8477. ; 36:6, s. 1045-1059
- Relaterad länk:
-
https://doi.org/10.1...
-
visa fler...
-
https://urn.kb.se/re...
-
https://doi.org/10.1...
-
visa färre...
Abstract
Ämnesord
Stäng
- Cognitive and sensory abilities are vital in affecting survival under predation risk, leading to selection on brain anatomy. However, how exactly predation and brain evolution are linked has not yet been resolved, as current empirical evidence is inconclusive. This may be due to predation pressure having different effects across life stages and/or due to confounding factors in ecological comparisons of predation pressure. Here, we used adult guppies (Poecilia reticulata) to experimentally test how direct predation during adulthood would impact the relative brain size and brain anatomy of surviving individuals to examine if predators selectively remove individuals with specific brain morphology. To this end, we compared fish surviving predation to control fish, which were exposed to visual and olfactory predator cues but could not be predated on. We found that predation impacted the relative size of female brains. However, this effect was dependent on body size, as larger female survivors showed relatively larger brains, while smaller survivors showed relatively smaller brains when compared to control females. We found no differences in male relative brain size between survivors and controls, nor for any specific relative brain region sizes for either sex. Our results corroborate the important, yet complex, role of predation as an important driver of variation in brain size.
Ämnesord
- NATURVETENSKAP -- Biologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences (hsv//eng)
Nyckelord
- Survival
- Guppy
- Natural selection
- Phenotypic plasticity
- Brain size evolution
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas